LeanFast: Intermittent Fasting
Hajer Trabelsi Health & Fitness iPhoneiPadiPod touchApple Watch
LeanFast: Intermittent Fasting is a free Health & Fitness app for iPhone and iPad by Hajer Trabelsi. Requires iOS 26.1. Updated October 26, 2026.
- Price
- Free
- on the App Store
- Size
- 46 MB
- Age 12+
- Updated
- Oct 26
- 2026 · v1.2.1
Screenshots
About LeanFast: Intermittent Fasting
Plan, track and keep up your intermittent fasting, with water, weight and food in one place. LeanFast shapes a plan around your body and your week, shows Fasting or Eating at a glance, logs your fasts, water, meals and weigh-ins, and suggests recipes for your eating window. No ads, no trackers, AI that stays on your device, and safety built in. Free to start. WHY LEANFAST • No ads, ever. No trackers, and your data is never sold. • Private AI: with Apple Intelligence, Coach answers your questions on your device, with the sources behind each answer, and Lens reads labels and barcodes there too. Smart Lens is optional, runs in Europe and doesn't keep your photo. • Safety first: a short health check adapts your plan, and "I don't feel well" stops your fast and calls the local emergency number in 234 countries and territories. • Backed by science: every source is listed in Settings › Health sources. • Accessible: VoiceOver, Dynamic Type at every size and Reduce Motion. • Everywhere: iPhone, iPhone Duo, iPad and Apple Watch. ALWAYS OBVIOUS One big word tells you where you are: Fasting, Eating or Not fasting, on Today, your Lock Screen, widgets and Apple Watch. Tap Start fast in the evening reminder, or turn on Autopilot: every planned fast starts when your eating window closes and ends when the next one opens. PLANS AS UNIQUE AS YOU LeanFast recommends Spark (from 12:12), Flow (the classic 16:8) or Blaze (longer fasts) and eases you in over four weeks. Shape every day on a 24-hour dial: brunch on Sunday, a late dinner on Friday, rest days when you need them. A TIMER YOU CAN GLANCE AT Follow your body stage by stage, with a new explanation at each milestone, on your Lock Screen, in the Dynamic Island, widgets and Control Center. Siri can start your fast, and the Watch app keeps going when your iPhone is out of range. MOTIVATION THAT'S GOOD FOR YOU Weekly challenges and levels reward consistency, water and logging, never longer fasts. A sick day never breaks your streak, and friendly water reminders let you log a glass from the notification. LEANFAST PRISM • Lens: a Fast-Friendly grade, nutrition facts and healthier swaps for any meal, label or barcode. • Kitchen: 96 photographed recipes to break your fast, with cook mode, timers and a shopping list. • Coach: a weekly review, answers to your questions and a nudge when your plan should change. • Deep insights: weight trend, goal forecast, consistency calendar and time in each stage. • Ring themes, app icons, progress photos, Streak Shields and custom fasts. WORKS WITH APPLE HEALTH Fill in your profile from Apple Health, import weigh-ins from your smart scale and save the weight and water you log. You choose what's shared. PRICING Free to use, no account needed. Prism is available monthly or yearly (each with a 7-day free trial) or as a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in your Apple Account settings. LeanFast provides general wellness information and is not a medical device or a substitute for professional medical advice. Terms: https://lean-fast.com/terms Privacy: https://lean-fast.com/privacy
What’s new
Version 1.2.1 · Updated October 26, 2026
• Sign in with Apple or Google, or keep using an email code. • Prism now follows your account, so a purchase also unlocks LeanFast on your other devices, Android included. • Each plan shows one realistic goal estimate, and the goal weight can't go below a healthy weight. • Gentler onboarding when fasting isn't right for you. • Sync is more reliable between iPhone, iPad and Android. • You may need to sign in once more after this update. Your data stays on your device.
App privacy
The developer, Hajer Trabelsi, reported these privacy practices to Apple.
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Health & Fitness: Health, Fitness
- Purchases: Purchase History
- Contact Info: Email Address, Name
- User Content: Other User Content
- Identifiers: User ID
- Other Data: Other Data Types
Used for: App Functionality
Data Not Linked to You
The following data, which may be collected but is not linked to your identity, may be used for the following purposes:
- User Content: Photos or Videos
- Sensitive Info: Sensitive Info
Used for: App Functionality
Alternatives to LeanFast: Intermittent Fasting
Looking for apps like LeanFast: Intermittent Fasting? Here are 6 similar apps on the App Store. The highest rated is 0mg (5.0/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| LeanFast: Intermittent Fasting | – | Free | October 26, 2026 | |
| PouchWise: Quit Snus Tracker | 4.5 / 5 (2) | Free | Oct 2, 2026 | Compare |
| 0mg | 5.0 / 5 (2) | Free | Nov 10, 2025 | Compare |
| PHUL Workout Split Routine | 5.0 / 5 (3) | Free | Feb 13, 2024 | Compare |
| Cigarette Count: Stub Out | 5.0 / 5 (14) | Free | Oct 21, 2026 | Compare |
| La Suite Coaching | – | Free | May 5, 2026 | Compare |
| myRunstreak | 2.5 / 5 (4) | Free | Jan 9, 2022 | Compare |